[ADD] Recursive organizational structure CTE sample

Author: stivenramireza

tasks/13-recursive-organizational-structure-cte.sql

@@ -0,0 +1,19 @@
+WITH RECURSIVE bosses AS (
+	-- Init
+	SELECT id, name, reports_to, 1 AS depth
+	FROM employees
+	WHERE id = 1
+	UNION
+	-- Recursive
+	SELECT e.id, e.name, e.reports_to, depth + 1
+	FROM employees AS e
+	INNER JOIN bosses AS b ON b.id = e.reports_to
+	WHERE depth < 6
+)
+
+SELECT
+	b.name,
+	e.name AS reports_to
+FROM bosses AS b
+LEFT JOIN employees AS e ON e.id = b.reports_to
+ORDER BY b.depth;